Magnetic head having a thin film conductor coil assembly formed separate from a magnetic head core

Abstract

A magnetic head which can be miniaturized while maintaining the performance thereof includes a thin film conductor coil assembly having a magnetic core connected magnetically to magnetic substances and stepping across a non-magnetic substance located between the magnetic substances of a substrate and a thin film conductor coil formed with the magnetic core as a thin film magnetic core. This thin film conductor coil assembly is attached to a slider provided with a magnetic head core. The magnetic head core includes an I-core in which magnetic substances are formed on both sides of a non-magnetic substance, and a U-shaped core composed of a magnetic substance, formed together in one integral body with a magnetic gap provided therein. This magnetic head core is fitted into a slit in the slider, and the thin film conductor coil assembly is attached thereon. With this construction, it is possible to form the thin film conductor coil into a thin film and to enlarge the magnetic path area, thereby to miniaturize the magnetic head while maintaining the performance thereof.

What is claimed is: 
     
       1. A magnetic head comprising: a magnetic head core assembly having an I-core defined by magnetic substances attached on oppositely facing side surfaces of a non-magnetic substance, and a U-shaped core having a non-magnetic substance located in a space portion on an open side of a U-shaped magnetic substance, said I-core attached to said U-shaped core so that the magnetic substance on one of the side surfaces of the I-core is attached to one side of the U-shaped magnetic substance, and the magnetic substance on the other side of the I-core is opposed to a second side of the U-shaped magnetic substance with a magnetic gap therebetween, said magnetic head being provided on a slider having a pair of rails composed of a non-magnetic substance so that said magnetic gap is located on a same surface of said slider as said rails; and   a thin film conductor coil assembly including a substrate defined by magnetic substances attached on oppositely facing sides of another non-magnetic substance, a thin film magnetic core magnetically connecting said magnetic substances of the substrate to each other while spanning across said magnetic substance of said substrate, and a thin film conductor coil formed around said thin film magnetic core, said substrate attached to the corresponding non-magnetic and magnetic substances of said I-core.   
     
     
       2. A magnetic head according to claim 1, wherein said magnetic head core assembly is fitted and attached into a slit provided in at least one of the rails. 
     
     
       3. A magnetic head according to claim 1, wherein said magnetic head core assembly is fabricated in one body with the slider. 
     
     
       4. A magnetic head according to claim 1, wherein said slider includes three rails. 
     
     
       5. A magnetic head according to claim 1, wherein said thin film conductor coil assembly includes a thin film conductor coil wound in a spiral form around said magnetic core. 
     
     
       6. A magnetic head according to claim 5, wherein said thin film conductor coil is wound in a layer form. 
     
     
       7. A magnetic head comprising: a slider having a plurality of surfaces and at least two rails located on a first one of said surfaces;   a magnetic head core including: a U-shaped magnetic member attached to said slider and having first and second ends defined by ends of upstanding portions of the U-shaped member, and a non-magnetic substance located in an open portion of said U-shaped member; and   an I-core defined by first and second magnetic members attached to oppositely facing sides of a non-magnetic substance, said I-core attached to said U-shaped magnetic member so that the first magnetic member and said second magnetic member is opposed to the second end of said U-shaped magnetic member with a magnetic gap therebetween, said magnetic gap located on said slider surface containing said rails; and     a thin film conductor coil assembly including: a substrate attached to said I-core and defined by third and fourth magnetic members attached on opposite sides of a non-magnetic substance, said third magnetic member attached to said first magnetic member and said fourth magnetic member attached to said second magnetic member;   a thin film magnetic core magnetically connecting said third and fourth magnetic members to each other and extending across the non-magnetic substance of said thin film conductor coil assembly; and   a thin film conductor coil extending around said thin film conductor core;     wherein a magnetic path is defined through said first magnetic member, said third magnetic member, said thin film magnetic core, said fourth magnetic member, said second magnetic member, said U-shaped magnetic member and said magnetic gap.   
     
     
       8. A magnetic head according to claim 7, wherein said slider includes a slit formed in a second one of said surfaces orthogonal to said first surface, said slit extending into one of said rails, said magnetic head core located in said slit. 
     
     
       9. A magnetic head according to claim 8, wherein said slider is formed of a non-magnetic substance. 
     
     
       10. A magnetic head according to claim 7, wherein said U-shaped magnetic member is an end of said slider having a second one of said surfaces which is orthogonal to said first surface. 
     
     
       11. A magnetic head comprising: a slider formed from a magnetic substance and having a plurality of surfaces and at least two rails located on a first one of said surfaces;   a magnetic head core formed in one body with said slider and including: a U-shaped magnetic member formed from said slider magnetic substance, and having first and second ends defined by ends of up-standing portions of the U-shaped member, and a non-magnetic substance located in an open portion of said U-shaped member; and   an I-core defined by first and second magnetic members attached to oppositely facing sides of a non-magnetic substance, said I-core attached to said U-shaped magnetic member so that the first magnetic member is attached to the first end of said U-shaped magnetic member and said second magnetic member is opposed to the second end of said U-shaped magnetic member with a magnetic gap therebetween, said magnetic gap located on said slider surface containing said rails; and     a thin film conductor coil assembly including: a substrate attached to said I-core and defined by third and fourth magnetic members attached on opposite sides of a non-magnetic substance, said third magnetic member attached to said first magnetic member and said fourth magnetic member attached to said second magnetic member;   a thin film magnetic core magnetically connecting said third and fourth magnetic members to each other and extending across the non-magnetic substance of said thin film conductor coil assembly; and   a thin film conductor coil extending around said thin film conductor core;     wherein a magnetic path is defined through said first magnetic member, said third magnetic member, said thin film magnetic core, said fourth magnetic member, said second magnetic member, said U-shaped magnetic member and said magnetic gap.